HROWPIC_IRQMAX
KASSERT((irq > 0) && (irq <= HROWPIC_IRQMAX), ("en irq out of range"));
if (irq == HROWPIC_IRQMAX)
while (irq < HROWPIC_IRQMAX) {
#define HROWPIC_IRQ_MASK ((HROWPIC_IRQMAX-1) >> 1) /* irq bit pos in word */
u_int sc_vector[HROWPIC_IRQMAX];